I have upgraded my Lenovo A52 Thinkcentre with an Intel Pentium D925 (2 x 3.00)Ghz processor. My computer is working fine, however there is one slight problem. When I power on and the system goes through the initial BIOS it displays a message that the BIOS is invalid. It then displays a number of other messages and finally boots .
Everything then works fine - BIOS is: 2EKT46A.
Is there a BIOS upgrade that I can use to solve this problem?
As a prerequisite, ensure you have the proper CPU. Only D0 step Pentium Ds will work.
For the D925 the S-Spec number on the face of the processor would be SL9KA. (S-Spec SL9D9 is a C1 step CPU and will not work.) Note: Virtualization will not work on this machine.
If you have a SL9KA CPU, then a BIOs upgrade would be in order. Download the CD rom .iso from the Lenovo support site after entering your model and type number (in the format XXXX-XXX) on the support page, and then navigating to the downloads section, and then expanding the BIOs tab. Flashing the BIOs from within the operating system is not recommended. Burn the .iso file to a CD and reboot with it in the optical drive, and then follow the instructions on screen. When it asks if you want to update the motherboard serial number, or the model and type number select "no".
As long as you have a D0 step CPU installed this should clear up the problems.